Exam 59: The Biosphere

Biomagnification is a significant problem in aquatic communities.The amounts of chemicals magnify (increase or accumulate)at each new link in a food chain.Use the following information to calculate the level of chemical X in the large-mouth bass.One small plant can accumulate 1 unit of chemical X.A microscopic animal eats 15 small plants.A minnow consumes 10 microscopic animals,a large-mouth bass consumes 20 minnows.

Choose the letter of the best match from the following: -Very high solar energy input;temperature and moisture not limiting;high biomass,high total productivity;many species.

Which one of the following statements about the causes and effects of global warming is false?

Choose the letter of the best match from the following: -Spruce,fir;moose;deep snow,brief summer;vast sameness;marshes,lakes,and ponds.

A friend asks you about what has caused global warming.You explain

About 40% of the world's photosynthetic productivity occurs in _________floating in the oceans.

A layer of ozone in the upper atmosphere shields Earth from most

The eastern sides of the Sierra Nevada mountains are much drier than the western sides,and the vegetation is often different;this phenomenon is called the

Open tropical and subtropical grasslands with scattered shrubs and trees are called

One of the most serious and rapidly accelerating of all global environmental problems is the loss of

Biomes are broad regional areas with defined flora and fauna.Which one of the following choices correctly identifies the biomes shown plotted in the included graph of precipitation versus temperature?

Which one of the following statements about acid precipitation is false?

The orbit of Earth's revolution around the sun is inclined at an angle of 23.5 ^$\circ$ ,and this causes seasonal variation in the amount of solar energy reaching a given region.Which of the following does not differ for the tropics and polar regions?

Tropical climates are warmer than temperate climates because

Microscopic plant-like organisms are collectively called

Chlorinated hydrocarbons cause

The equatorial region of rising warm,moist air of low pressure causes

Which one of the following statements about ozone depletion is false?

Which of the following choices best describes the relationship that exists between moisture and air temperature?

Which of the following gases is most associated with global warming?